/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package control;

import database.database;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 * @author Widhaprasa Waliprana
 */
public class CategoryAdd extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            /* TODO output your page here
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet CategoryAdd</title>");  
            out.println("</head>");
            out.println("<body>");
            out.println("<h1>Servlet CategoryAdd at " + request.getContextPath () + "</h1>");
            out.println("</body>");
            out.println("</html>");
             */
            database db = new database();
            db.createConnection();

            String id = "";
            String name = "";
            String code = "";
            int codenum = 1;
            String offset = "";
            id = request.getParameter("category");
            name = request.getParameter("name");

            db.update("INSERT INTO categorydb (categoryname, parentid, categorycode) VALUES ('" + name + "'," + id + ",'')");

            db.select("SELECT MAX(categoryid) FROM categorydb");
            ResultSet rs = db.getResultSet();
            if (rs.next()) {
                codenum = rs.getInt("MAX(categoryid)");
                if (String.valueOf(codenum).length() == 1) {
                    offset = "00";
                } else if (String.valueOf(codenum).length() == 2) {
                    offset = "0";
                }
                code = name.substring(0, 2).toUpperCase() + offset + codenum;
            }

            db.update("UPDATE categorydb SET categorycode = '" + code + "' WHERE categoryid=" + rs.getInt("MAX(categoryid)"));

            db.closeConnection();
            if (Integer.parseInt(id) != 0) {
                response.sendRedirect("Home/Admin.jsp?category=" + id);
            } else {
                response.sendRedirect("Home/Admin.jsp");
            }

        } catch (ClassNotFoundException ex) {
            Logger.getLogger(CategoryAdd.class.getName()).log(Level.SEVERE, null, ex);
        } catch (SQLException ex) {
            Logger.getLogger(CategoryAdd.class.getName()).log(Level.SEVERE, null, ex);
        } finally {
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
